IBM System/360

Entry From
Control Program
(1)
...- __ --'- __ ---, (2)
Obtain
Main
Storage
...- __ --'- __ ---. (3)
...-- __ -L- __ -, (4)
Establish
Addressibil ity
of Control
Information
Rewind and
Unload Current
Volume
0---
Test Bits 1-2
in
JFCBMASK+S
Write a
Standard
Vol ume Label
or Tapemark
Zero UCB Vol
Ser No. and Set
Mount Switch
"ON"
Restore
Registers
Insert X'03'
in Reg 8
Release
Main
Storage
Return
to
Control Program
(17)
(20)
(21)
(22)
Figure 8.
General Flow of an Editor Routine
From the End-of-Volume Routine
After Receiving
60
(ISb)
Get Label Type
From
JFCBLTYP
Field.
Control